Home / 309,642-478,554

Finding the Third Proportional to 309,642 and 478,554

Calculator

Solution

The third proportional to 309,642 and 478,554 is: 739,608.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,642 : 478,554 = 478,554 : x
  2. Step 2: Convert to fraction form
    309,642/478,554 = 478,554/x
  3. Step 3: Cross multiply
    309,642x = 478,554 × 478,554
  4. Step 4: Simplify right side
    309,642x = 229,013,930,916
  5. Step 5: Solve for x
    x = 229,013,930,916/309,642
  6. Step 6: Final answer
    x = 739,608.74

Related Problems

Find third proportional to 154,821 and 239,277
Half scale
Find third proportional to 619,284 and 957,108
Double scale
Find third proportional to 309,644 and 478,557
Similar ratio
Find third proportional to 464,463 and 717,831
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.